Mat



FIG. 1 is a perspective view of mat showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines and the areas within the broken lines represent unclaimed parts of the mat and form no part of the claim. 

The ornamental design for a mat, as shown and described. 